Grease cookie sheets.
Place popcorn and peanuts in a paper bag. Set aside.
In a microwave safe bowl, combine sugar, butter, corn syrup, vanilla and salt. Microwave 4 minutes, until bubbly. Stir in baking soda. Pour over popcorn mixture and shake bag to coat.
Roll down edges of bag and place bag in microwave. Heat for 2 minutes, shaking three times to mix. Spread mixture onto prepared sheets to cool.
In a microwave safe bowl, combine chocolate and shortening. Microwave 90 seconds, stirring once, until melted. Drizzle over popcorn mixture. Let cool before serving.
